There is no reason in principle, and you can even do it for kicks.[1] The only issue here is a practical one, as the parent poster described: from an end-user p

There is no reason in principle, and you can even do it for kicks.[1] The only issue here is a practical one, as the parent poster described: from an end-user perspective, browsers do SSL/TLS better than ad-blocking proxies. [1]: An example from the other side of the coin: http://www.wired.com/2010/03/packet-forensics/ http://www.wired.com/2010/03/packet-forensics/